66877109 has 16 divisors (see below), whose sum is σ = 74210304. Its totient is φ = 59875200.

The previous prime is 66877091. The next prime is 66877121. The reversal of 66877109 is 90177866.

It is a cyclic number.

It is not a de Polignac number, because 66877109 - 2⁸ = 66876853 is a prime.

It is a super-3 number, since 3×66877109³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66877109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66877159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144212 + ... + 144674.

It is an arithmetic number, because the mean of its divisors is an integer number (4638144).

Almost surely, 2^66877109 is an apocalyptic number.

It is an amenable number.

66877109 is a deficient number, since it is larger than the sum of its proper divisors (7333195).

66877109 is a wasteful number, since it uses less digits than its factorization.

66877109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 66877109 is about 8177.8425639040. The cubic root of 66877109 is about 405.9063358234.

It can be divided in two parts, 668 and 77109, that added together give a palindrome (77777).

The spelling of 66877109 in words is "sixty-six million, eight hundred seventy-seven thousand, one hundred nine".